130 lines
4.1 KiB
C++
130 lines
4.1 KiB
C++
/*
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* Copyright 2018 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#pragma once
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#include <android-base/thread_annotations.h>
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#include <utils/RefBase.h>
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#include <utils/Timers.h>
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#include <map>
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#include <memory>
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#include <mutex>
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#include <string>
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#include <utility>
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#include <vector>
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#include "RefreshRateConfigs.h"
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namespace android {
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class Layer;
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namespace scheduler {
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class LayerInfo;
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class LayerHistory {
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public:
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using LayerVoteType = RefreshRateConfigs::LayerVoteType;
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LayerHistory();
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~LayerHistory();
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// Layers are unregistered when the weak reference expires.
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void registerLayer(Layer*, LayerVoteType type);
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// Sets the display size. Client is responsible for synchronization.
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void setDisplayArea(uint32_t displayArea) { mDisplayArea = displayArea; }
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// Sets whether a mode change is pending to be applied
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void setModeChangePending(bool pending) { mModeChangePending = pending; }
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// Represents which layer activity is recorded
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enum class LayerUpdateType {
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Buffer, // a new buffer queued
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AnimationTX, // a new transaction with eAnimation flag set
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SetFrameRate, // setFrameRate API was called
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};
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// Marks the layer as active, and records the given state to its history.
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void record(Layer*, nsecs_t presentTime, nsecs_t now, LayerUpdateType updateType);
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using Summary = std::vector<RefreshRateConfigs::LayerRequirement>;
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// Rebuilds sets of active/inactive layers, and accumulates stats for active layers.
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Summary summarize(const RefreshRateConfigs&, nsecs_t now);
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void clear();
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void deregisterLayer(Layer*);
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std::string dump() const;
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// return the frames per second of the layer with the given sequence id.
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float getLayerFramerate(nsecs_t now, int32_t id) const;
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private:
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friend class LayerHistoryTest;
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friend class TestableScheduler;
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using LayerPair = std::pair<Layer*, std::unique_ptr<LayerInfo>>;
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// keyed by id as returned from Layer::getSequence()
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using LayerInfos = std::unordered_map<int32_t, LayerPair>;
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// Iterates over layers maps moving all active layers to mActiveLayerInfos and all inactive
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// layers to mInactiveLayerInfos.
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// worst case time complexity is O(2 * inactive + active)
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void partitionLayers(nsecs_t now) REQUIRES(mLock);
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enum class LayerStatus {
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NotFound,
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LayerInActiveMap,
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LayerInInactiveMap,
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};
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// looks up a layer by sequence id in both layerInfo maps.
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// The first element indicates if and where the item was found
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std::pair<LayerStatus, LayerPair*> findLayer(int32_t id) REQUIRES(mLock);
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std::pair<LayerStatus, const LayerPair*> findLayer(int32_t id) const REQUIRES(mLock) {
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return const_cast<LayerHistory*>(this)->findLayer(id);
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}
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mutable std::mutex mLock;
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// Partitioned into two maps to facility two kinds of retrieval:
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// 1. retrieval of a layer by id (attempt lookup in both maps)
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// 2. retrieval of all active layers (iterate that map)
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// The partitioning is allowed to become out of date but calling partitionLayers refreshes the
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// validity of each map.
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LayerInfos mActiveLayerInfos GUARDED_BY(mLock);
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LayerInfos mInactiveLayerInfos GUARDED_BY(mLock);
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uint32_t mDisplayArea = 0;
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// Whether to emit systrace output and debug logs.
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const bool mTraceEnabled;
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// Whether to use priority sent from WindowManager to determine the relevancy of the layer.
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const bool mUseFrameRatePriority;
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// Whether a mode change is in progress or not
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std::atomic<bool> mModeChangePending = false;
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};
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} // namespace scheduler
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} // namespace android
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